Dev mode revamp

flake.nix

@@ -117,6 +117,11 @@
               default = false;
               description = "Open ports in the firewall for the service.";
             };
+            devModeDefault = lib.mkOption {
+              type = lib.types.bool;
+              default = false;
+              description = "Whether new games start with Dev Mode (testing shortcuts) enabled.";
+            };
           };
 
           config = lib.mkIf cfg.enable {
@@ -129,6 +134,9 @@
 
               environment = {
                 DATABASE_URL = "sqlite:///${cfg.databasePath}";
+                # Unset means "local checkout" and defaults Dev Mode on, so the
+                # service must always set it explicitly.
+                PIRATS_DEV_MODE = lib.boolToString cfg.devModeDefault;
               };
 
               serviceConfig = {